Under SEAGARS/MAXHAM/MARKHAM;
1841 Census
Jaques Hall?
Bradfield, Essex
HO107/338/6/Bradfield
William MARKHAM, 50, Ag Lab
Esther Maxham, 50
Robert SEAGARS, 20, M/S (male servant)
Sarah Seagars, 20
Sarah Ann Seagars, 2mths
All born in County
William/Esther named 2 Children SARAH and the 1st 1813 died;
Christenings dates;
SARAH, 15 Nov 1813, Southchurch, Essex, Burial 25 Nov 1813
WILLIAM, 13 Feb 1820, Bradfield, Essex
SARAH, 06 July 1817, Bradfield, Essex (Mother Hester)
(Source Familysearch Pilot)
So I think the 1817 Christening is your Sarah which matches 1851 Census where she is born c 1817.
Trish
